Radiographic and CT Examinations All diagnostic examinations were performed with various radiography, fluoroscopy, and CT (ranged from 16 to 128 slice) machines from different manufacturers. Abdominal areas were covered with lead shielding during the imaging under physician supervision. The body was divided into three zones according to distance from the fetus. The first zone consisted of the head area, the lower extremities below the knee, and the upper extremities; the second consisted of the cervicothoracic region and upper thighs; and third part consisted of the abdominopelvic area.